For someone who's never been to Comic-Con, the whole idea seems a bit baffling—waiting in line all day to attend a half-hour promotional junket for a movie that won't be out for another year, getting to say you were there when Robert Downey, Jr. said he had a pretty good time making this next Avengers movie. But it…»8/07/14 3:17pm 8/07/14 3:17pm